October weather forecast
Hannibal, MO

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The stunning Mark Twain Memorial Lighthouse stands tall in white among the surrounding rocks and greenery in Hannibal, Missouri
The stunning Mark Twain Memorial Lighthouse stands tall in white among the surrounding rocks and greenery in Hannibal, Missouri

Weather in October

October brings about marked changes in Hannibal's climate, embracing the fall season in earnest with cooling temperatures, abundant foliage, and reduced daylight hours. The characteristics of summer retreat and the month wears a distinctive autumnal look. October truly captures the essence of fall, adopting cooler temperatures that render the landscape in shades of gold and auburn. The temperatures range from 47.1°F (8.4°C) to 64.4°F (18°C). Visiting Hannibal, Missouri during this time offers a myriad of scenic views, infused with the nostalgic allure of a classic midwestern autumn.

Temperature

The arrival of October in Hannibal signals a shift in temperature, down from a warm 78.4°F (25.8°C) in September to a refreshing 64.4°F (18°C). During October, Hannibal records a consistent average nighttime temperature of 47.1°F (8.4°C).

Humidity

With an average relative humidity of 70%, October is the least humid month.

Rainfall

In Hannibal, in October, during 10.8 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In Hannibal, during the entire year, the rain falls for 136 days and collects up to 25" (635mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In October, the average length of the day in Hannibal is 11h and 8min.
On the first day of the month, sunrise is at 7:02 am and sunset at 6:47 pm. On the last day of October, sunrise is at 7:33 am and sunset at 6:04 pm CDT.

Sunshine

The average sunshine in October is 5.8h.

UV index

In Hannibal, the average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily high UV index of 3 in October leads to these guidelines:
Ensure safety - Sun damage prevention is strongly urged. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

What is the average October temperature in Hannibal?

An average high-temperature, in October, in Hannibal, is 64.4°F (18°C) and the average low-temperature is 47.1°F (8.4°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 93.2°F (34°C).

What is the least humid month in Hannibal?

October is the least humid month, with an average relative humidity of 70%.

What is the average humidity in October in Hannibal?

In October, the average relative humidity is 70%.

How much does it rain in Hannibal in October?

In Hannibal, Missouri, in October, it is raining for 10.8 days, with typically 1.89" (48mm) of accumulated precipitation.

When it does not snow in Hannibal?

May through October are months without snowfall in Hannibal.

Does it snow in Hannibal in October?

In Hannibal, Missouri, in October, it doesn't snow. In November, it regularly snows.

How many hours of daylight does Hannibal have in October?

In Hannibal, Missouri, the average day length in October is 11h and 8min.

When are sunrise and sunset in October in Hannibal?

In October, on the first day of the month, sunrise is at 7:02 am and sunset at 6:47 pm. On the last day of the month, in Hannibal, Missouri, sunrise is at 7:33 am and sunset at 6:04 pm CDT.

How long on average sun shines in October in Hannibal?

In Hannibal, the average sunshine duration in October is 5.8h.

What is the UV index reading in October in Hannibal?

In Hannibal, Missouri, the average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Hannibal, MO

Average temperature in October - Hannibal, MO
  • Average high temperature in October: 64.4°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in October: 47.1°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

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Average pressure in October
Hannibal, MO

Average pressure in October - Hannibal, MO
  • Average pressure in October: 30.02"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in October
Hannibal, MO

Average wind speed in October - Hannibal, MO
  • Average wind speed in October: 8.6mph

The windiest months (with the highest average wind speed) are January, February and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

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Average humidity in October
Hannibal, MO

Average humidity in October - Hannibal, MO
  • Average humidity in October: 70%

The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in October
Hannibal, MO

Average rainfall in October - Hannibal, MO
  • Average rainfall in October: 1.89"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is January (1.14").

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Average rainfall days in October
Hannibal, MO

Average rainfall days in October - Hannibal, MO
  • Average rainfall days in October: 10.8 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (5.3 days).

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Average snowfall in October
Hannibal, MO

Average snowfall in October - Hannibal, MO
  • Average snowfall in October: 0"

The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in October
Hannibal, MO

Average snowfall days in October - Hannibal, MO
  • Average snowfall days in October: 0.1 days

The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in October /
Average sunshine in October
Hannibal, MO

Average daylight in October / Average sunshine in October - Hannibal, MO
  • Average daylight in October: 11h and 1min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in October: 5h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

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Average sunshine days in October
Hannibal, MO

Average sunshine days in October - Hannibal, MO
  • Average sunshine days in October: 19.3 days

The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is June (11.6 days).

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Average UV index in October
Hannibal, MO

Average UV index in October - Hannibal, MO
  • Average UV index in October: 3

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in October
Hannibal, MO

Average cloud cover in October - Hannibal, MO
  • Average cloud cover in October: 33

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).

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Average visibility in October
Hannibal, MO

Average visibility in October - Hannibal, MO
  • Average visibility in October: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Hannibal, Missouri, USA

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